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I am Quentin (I'm french, sorry for my english) and I'm not an expert in electronic... I need to create a laser (if it can burn, it will be nice) with a laser diode of a DVD burner. I made a driver to supply a laser diode from a DVD/CD RW Burner.
(Sony NEC Optiarc AD-5200A - Lecteur de disque - DVD±RW (±R DL) - 20x/20x - IDE - interne - 5.25" - noir Sony)

The symbol of the LM317 doesn't directly translate to the physical LM317 ,

Looking at how you have it , you are trying to put power into the Adjust pin .

On the LM317 ( pins pointing down , front of the LM317 facing you ) from left to right it is - Adjust , V Out , V In

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Stuck In The places I Hated The Most , Reboot My Memory , Restart My heart , Seal Up All Of My Wounds Take Me Back To The Start !
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The symbol of the LM317 doesn't directly translate to the physical LM317 ,

Looking at how you have it , you are trying to put power into the Adjust pin .

On the LM317 ( pins pointing down , front of the LM317 facing you ) from left to right it is - Adjust , V Out , V In

Ok thank you! (Yes I'm not an expert...) It's so much better. The power of the glow change now! but with the maximum of the power, the diode is apparent, but not very much... It's about the capacity of the laser diode you think?

Now, my circuit is like that (I think it's right this time) :

Edit :

And after reflexion, I note that the laser diode and the LM317 are really hot... I don't know if this is normal.

I'm not sure I am seeing the wiring correctly or not, but the variable resistor didn't look wired correctly to me in the photo, you should connect one of the two wires of this part to the wiper pin, right now it looks like you have it hooked up to act as a simple resistor and when you adjust it, the resistance won't change at all that way.

If the regulator is getting hot, put a heat sink on it, but I don't know the current you are trying to push to know if it is needed or not.

Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.